Clip-on lens



FIG. 1 is a perspective view of the clip-on lens as used in conjunction with a pair of glasses shown in dot dash lines and which do not form a portion of the instant design;

FIG. 2 is a top plan view of the clip-on lens;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a side elevational view as seen from the left hand side of FIG. 3;

FIG. 5 is a side elevational view as seen from the right hand side of FIG. 3;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a rear elevational view thereof. 

An ornamental design for a clip-on lens. 